A couple minor improvements for tidy error handling.#40653

Merged

bors merged 2 commits intorust-lang:masterfrom

frewsxcv:tidy-handling

Apr 10, 2017

Commits on Apr 2, 2017

Don't panic if we have tidy errors.
frewsxcv
committed

Commits on Apr 9, 2017

Print tidy errors to stderr, prefix with 'tidy error: ', handle 'bad' state.
frewsxcv
committed